Classic Airframes is the only company that has released an A5M4-K in 1/48, AFAIK.
HERE for a review by Hyperscale's own Brett Green.
In 1/72 there is only the Choroszy Modelbud resin kit.
And in 1/144 there is the kit released by A&W.
Take a look HERE for an excellent model by Martin Sokolowski.
And HERE for a detailed review and model built by John C. Valo.